How to define "D"prefix operator

• Subject: How to define "D"prefix operator
• From: Part Marty
• Date: Sat, 3 Dec 2011 14:38:05 +0900

Please tell me how to define "D"prefix  operator.D means prefix operator and "d/dx" differential operator.I want to solve "(D+x) (D+2*x) exp(x)". 		 	   		  

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